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Finding the Fourth Proportional to 98,290.72, 135,639.84 and 53,578.72

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Solution

The fourth proportional to 98,290.72, 135,639.84 and 53,578.72 is: 73,937.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,290.72 : 135,639.84 = 53,578.72 : x
  2. Step 2: Convert to fraction form
    98,290.72/135,639.84 = 53,578.72/x
  3. Step 3: Cross multiply
    98,290.72x = 135,639.84 × 53,578.72
  4. Step 4: Simplify right side
    98,290.72x = 7,267,409,008.20
  5. Step 5: Solve for x
    x = 7,267,409,008.20/98,290.72
  6. Step 6: Final answer
    x = 73,937.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.